Olefin Polymerization Catalyst with Internal Electron Donor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for catalysts that offer better control of stereochemistry and the ability to produce polyolefins with broader molecular weight distribution, which is not effectively addressed by existing Ziegler-Natta catalyst systems.
Innovation Solution
A catalyst composition comprising a specific internal electron donor compound, represented by formula (I), is used in combination with a magnesium-containing support and a halogen-containing titanium compound to achieve improved stereochemistry and molecular weight distribution in polyolefin production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional Ziegler-Natta catalyst systems are used, then the catalyst structure is simple and easy to manufacture, but the control of stereochemistry and molecular weight distribution is insufficient
Solution Approach 1:
The patent applies parameter changes by introducing a specific internal electron donor compound with defined molecular structure (formula I) containing nitrogen and oxygen atoms with specific取代基 groups. This chemical parameter change in the catalyst composition enables improved stereochemical control and broader molecular weight distribution compared to conventional catalysts, directly resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The patent employs composite materials by formulating a catalyst composition that integrates multiple components: a magnesium-containing support, a halogen-containing titanium compound, and a specific internal electron donor compound of formula (I). This composite catalyst system achieves synergistic effects where each component contributes specific functions, enabling superior stereochemistry control and molecular weight distribution while maintaining practical manufacturability.
2Manufacturing precision
If conventional Ziegler-Natta catalyst systems are used, then the catalyst composition is simple, but the molecular weight distribution is narrow
Solution Approach 1:
The patent utilizes parameter changes by incorporating an internal electron donor compound with specific molecular characteristics (formula I) that has nitrogen and oxygen atoms with particular取代基 configurations. This chemical parameter modification in the catalyst system directly broadens the molecular weight distribution of the produced polyolefins while maintaining catalyst compositional simplicity through a well-defined molecular structure.
3Manufacturing precision
If conventional Ziegler-Natta catalyst systems are used, then the catalyst is easy to manufacture, but the isotacticity control is insufficient
Solution Approach 1:
The patent applies parameter changes by introducing an internal electron donor compound of formula (I) with specific nitrogen and oxygen atom configurations and defined取代基 groups. This chemical parameter change in the catalyst composition enhances isotacticity control during polyolefin polymerization, achieving higher stereoregularity while maintaining reasonable catalyst composition complexity through a well-structured molecular design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst composition allows for the production of polyolefins with higher isotacticity and broader molecular weight distribution, reducing xylene solubles content and melt flow range, leading to improved process stability and suitability for various polymer applications.
Implementation Method 1
A catalyst composition for polymerization of olefins which comprises the compound represented by the Fischer projection of formula (I) as an internal electron donor
Implementation Method 2
catalyst composition for polymerization of olefins
Data Source
AI summary
The present invention relates to a catalyst composition comprising the compound represented by the Fischer projection of formula (I) as an internal electron donor, (I) wherein: R1, R2, R3, R4, R5 and R6 are the same or different and are independently selected from a group consisting of hydrogen, straight, branched and cyclic alkyl and aromatic substituted and unsubstituted hydrocarbyl having 1 to 20 carbon atoms; R7 is selected from a group consisting of straight, branched and cyclic alkyl and aromatic substituted and unsubstituted hydrocarbyl having 1 to 20 carbon atoms; and R8 is selected from a group consisting of aromatic substituted and unsubstituted hydrocarbyl having 6 to 20 carbon atoms; N is nitrogen atom; O is oxygen atom; and C is carbon atom. The present invention also relates to a process for preparing said polymerization catalyst composition and to a polymerization catalyst system comprising said catalyst composition, a cocatalyst and optionally an external electron donor. Furthermore, the present invention relates to a polyolefin obtainable by the process according to the present invention and to the use of the compound of formula (I) as in internal electron donor in catalysts for polymerization of olefins.